多发性硬化应与下列疾病鉴别,但除外()
A.急性播散性脑脊髓炎
B.腔隙性脑梗死
C.脑干和脊髓血管畸形伴多次出血发作
D.系统性红斑狼疮
E.脊髓型颈椎病
参考答案:B
—Cliff, I lost your bike at school. I suppose I should pay for it.
—Oh, ________. It was an old bike anyway.[ ]
A. take it easy
B. OK
C. don't say so
D. forget it
G21代码是米制输入功能,它是( )组非模态G代码。
A.10
B.04
C.06
D.05